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small progress added to audio reversing

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This commit is contained in:
itsmattkc
2018-10-08 20:26:18 +11:00
parent 1123abd82e
commit cb098cc2bb
1 changed files with 11 additions and 8 deletions
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playback/cacher.cpp
+11 -8
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@@ -69,7 +69,7 @@ void apply_audio_effects(Clip* c, double timecode_start, AVFrame* frame, int nb_
void cache_audio_worker(Clip* c, Clip* nest) {
int written = 0;
int max_write = 16384;
int max_write = 16384; // TODO totally arbitrary, should probably remove
long timeline_in = c->timeline_in;
long timeline_out = c->timeline_out;
@@ -78,7 +78,7 @@ void cache_audio_worker(Clip* c, Clip* nest) {
timeline_out = refactor_frame_number(timeline_out, c->sequence->frame_rate, sequence->frame_rate) + nest->timeline_in;
}
while (written < max_write) {
while (written < max_write) { // TODO max_write is totally arbitrary, should probably just be an infinite loop or something
// gets one frame worth of audio and sends it to the audio buffer
AVFrame* frame;
int nb_bytes = INT_MAX;
@@ -110,19 +110,22 @@ void cache_audio_worker(Clip* c, Clip* nest) {
if (!c->audio_just_reset) {
// get previous frame?
avcodec_flush_buffers(c->codecCtx);
av_seek_frame(c->formatCtx, c->stream->index, c->frame->pts - c->frame->pkt_duration, AVSEEK_FLAG_BACKWARD);
avcodec_flush_buffers(c->codecCtx);
av_seek_frame(c->formatCtx, c->stream->index, c->frame->pts - c->frame->pkt_duration - c->frame->pkt_duration, AVSEEK_FLAG_BACKWARD);
}
ret = retrieve_next_frame(c, c->frame);
ret = retrieve_next_frame(c, c->frame);
qDebug() << c->frame->nb_samples << c->frame->linesize[0];
ret = retrieve_next_frame(c, c->frame);
qDebug() << c->frame->nb_samples << c->frame->linesize[0];
// reverse it
AVSampleFormat sample_fmt = static_cast<AVSampleFormat>(c->frame->format);
if (av_sample_fmt_is_planar(sample_fmt)) {
int sample_size = av_get_bytes_per_sample(sample_fmt);
int sample_size = av_get_bytes_per_sample(sample_fmt);
char* temp_chars = new char[sample_size];
for (int j=0;j<c->frame->channels;j++) {
int frame_bytes = c->frame->linesize[0];
int frame_bytes = c->frame->linesize[0]/2;
int half_frame_bytes = frame_bytes >> 1;
for (int i=0;i<half_frame_bytes;i+=sample_size) {
for (int k=0;k<sample_size;k++) {
@@ -136,7 +139,7 @@ void cache_audio_worker(Clip* c, Clip* nest) {
}
}
}
delete [] temp_chars;
delete [] temp_chars;
} else {
int frame_bytes = av_samples_get_buffer_size(NULL, c->frame->channels, c->frame->nb_samples, sample_fmt, 1);
int half_frame_bytes = frame_bytes >> 1;